ci.yaml

name: 'Terraform'

on:
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]
  workflow_dispatch:

env:
  TF_VAR_project_id: ${{ secrets.GCP_PROJECT_ID }}
  TF_VAR_region: ${{ secrets.GCP_REGION }}
  TF_VAR_app_name:  ${{ secrets.GCP_APP_NAME }}
  TF_VAR_image: gcr.io/${{ secrets.GCP_PROJECT_ID }}/${{ secrets.GCP_APP_NAME }}
  GOOGLE_CREDENTIALS: ${{ secrets.GCP_CREDENTIALS }}

jobs:
  test:
    runs-on: ubuntu-latest
    name: Check project healthiness

    steps:
      - uses: actions/checkout@v3

      - uses: denoland/setup-deno@v1
        with:
          deno-version: v1.x

      - name: Cache deps
        run: deno cache deps.ts

      - name: Cache app
        run: deno cache src/main.ts

      - name: Check format issues
        run: deno fmt --check

      - name: Check lint issues
        run: deno lint

      - name: Run tests
        run: deno test --allow-none

  build:
    needs: [test]
    runs-on: ubuntu-latest
    name: Build image and push to Google Container Registry

    steps:
      - uses: actions/checkout@v3

      - name: Login
        uses: google-github-actions/setup-gcloud@v0
        with:
          project_id: ${{ secrets.GCP_PROJECT_ID }}
          service_account_email: ${{ secrets.GCP_EMAIL }}
          service_account_key: ${{ secrets.GCP_CREDENTIALS }}

      - name: Configure Docker
        run: gcloud auth configure-docker --quiet

      - name: Build Docker image
        run: docker build . -t $TF_VAR_image

      - name: Test Docker image
        run: docker run $TF_VAR_image sh -c "deno test --allow-none"

      - name: Push Docker image
        run: docker push $TF_VAR_image

  deploy:
    needs: [build]
    runs-on: ubuntu-latest
    name: Deploy image using Terraform

    steps:
      - uses: actions/checkout@v3

      - uses: hashicorp/setup-terraform@v2

      - name: Terraform fmt
        id: fmt
        run: terraform fmt -check
        continue-on-error: true
        working-directory: ./terraform

      - name: Terraform Init
        id: init
        run: terraform init
        working-directory: ./terraform

      - name: Terraform Validate
        id: validate
        run: terraform validate -no-color
        working-directory: ./terraform

      - name: Terraform Plan
        id: plan
        run: terraform plan -no-color
        continue-on-error: true
        working-directory: ./terraform

      - uses: actions/github-script@v6
        if: github.event_name == 'pull_request'
        env:
          PLAN: "terraform\n${{ steps.plan.outputs.stdout }}"
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            // 1. Retrieve existing bot comments for the PR
            const { data: comments } = await github.rest.issues.listComments({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
            })
            const botComment = comments.find(comment => {
              return comment.user.type === 'Bot' && comment.body.includes('Terraform Format and Style')
            })

            // 2. Prepare format of the comment
            const output = `#### Terraform Format and Style 🖌\`${{ steps.fmt.outcome }}\`
            #### Terraform Initialization ⚙️\`${{ steps.init.outcome }}\`
            #### Terraform Validation 🤖\`${{ steps.validate.outcome }}\`
            <details><summary>Validation Output</summary>

            \`\`\`\n
            ${{ steps.validate.outputs.stdout }}
            \`\`\`

            </details>

            #### Terraform Plan 📖\`${{ steps.plan.outcome }}\`

            <details><summary>Show Plan</summary>

            \`\`\`\n
            ${process.env.PLAN}
            \`\`\`

            </details>

            *Pusher: @${{ github.actor }}, Action: \`${{ github.event_name }}\`, Working Directory: \`${{ env.tf_actions_working_dir }}\`, Workflow: \`${{ github.workflow }}\`*`;

            // 3. If we have a comment, update it, otherwise create a new one
            if (botComment) {
              github.rest.issues.updateComment({
                owner: context.repo.owner,
                repo: context.repo.repo,
                comment_id: botComment.id,
                body: output
              })
            } else {
              github.rest.issues.createComment({
                issue_number: context.issue.number,
                owner: context.repo.owner,
                repo: context.repo.repo,
                body: output
              })
            }
      - name: Terraform Apply
        if: github.ref == 'refs/heads/main' && github.event_name == 'push'
        run: terraform apply -auto-approve -input=false
        working-directory: ./terraform